How does setting a donation option as the default in a charitable appeal affect people's decisions? In eight studies, comprising 11,508 participants making 2,423 donation decisions in both experimental settings and a large-scale natural field experiment, the authors investigate the effect of “choice-option” defaults on the donation rate, average donation amount, and the resulting revenue. They find (1) a “scale-back” effect, in which low defaults reduce average donation amounts; (2) a “lower-bar” effect, in which defaulting a low amount increases donation rate; and (3) a “default-distraction” effect, in which introducing any defaults reduces the effect of other cues, such as positive charity information. Contrary to the view that setting defaults will backfire, defaults increased revenue in the field study. However, the findings suggest that defaults can sometimes be a “self-canceling” intervention, with countervailing effects of default option magnitude on decisions and resulting in no net effect on revenue. The authors discuss the implications of the findings for research on fundraising specifically, for choice architecture and behavioral interventions more generally, and for the use of “nudges” in policy decisions.
Although incentives can be a powerful motivator of behavior when they are available, an influential body of research has suggested that rewards can persistently reduce engagement after they end. This research has resulted in widespread skepticism among practitioners and academics alike about using incentives to motivate behavior change. However, recent field studies looking at the longer term effects of temporary incentives have not found such detrimental behavior. We design an experimental framework to study dynamic behavior under temporary rewards, and find that although there is a robust decrease in engagement immediately after the incentive ends, engagement returns to a postreward baseline that is equal to or exceeds the initial baseline. As a result, the net effect of temporary incentives on behavior is strongly positive. The decrease in postreward engagement is not on account of a reduction in intrinsic motivation, but is instead driven by a desire to take a "break," consistent with maintaining a balance between goals with primarily immediate and primarily delayed benefits. Further supporting this interpretation, the initial decrease in postreward engagement is reduced by contextual factors (such as less task difficulty and higher magnitude incentives) that reduce the imbalance between effort and leisure. These findings are contrary to the predictions of major established accounts and have important implications for designing effective incentive policies to motivate behavior change. (PsycINFO Database Record
This paper presents an in-depth statistical analysis of an experiment designed to measure the extent to which players in a simple game behave according to a popular behavioral economic model. The p-beauty contest is a multi-player number guessing game that has been widely used to study strategic behavior. This paper describes beauty contest experiments for an audience of data analysts, with a special focus on a class of models for game play called k-step thinking models, which allow each player in the game to employ an idiosyncratic strategy. We fit a Bayesian statistical model to estimate the proportion of our player population whose game play is compatible with a k-step thinking model. Our findings put this number at approximately 25%.
Calorie labeling, an increasingly common policy intervention, has had mixed effects onconsumer food choices. We show that visual salience of the calorie labels, rather than merelyinformation content or format, is the key to reducing calorie. Our findings indicate that effectivelabeling, more visually salient than standard industry disclosures, works primarily as a reminder,by prompting people to consider nutrition rather than by providing new information. Bothvisually salient information and completely non-informative “mere reminders” to considercalories have similar effects on calorie choices, by making people more likely to incorporatetheir beliefs about nutrition into their decision. As a consequence, when consumers perceivehigh-calorie items as healthy, calorie labeling working as mere reminders will be less effectiveand can even backfire, leading to more choices of healthy-seeming high-calorie food options.The findings underscore the need for experimentally testing the psychological consequences ofeven ostensibly informational interventions.
ObjectivesTo assess the knowledge and practices related to COVID-19 among Bangladeshi mothers with children aged 2 years or less and adult males.DesignWe conducted a cross-sectional study to assess the knowledge and practices using a multistage cluster sampling technique.SettingsSix districts with high COVID-19 infection rates in Bangladesh.Participants2185 mothers of under-2 children and 657 adult males were surveyed in December 2020.Main outcome measuresWe constructed weighted composite knowledge and practice scores and examined associations between composite scores and background characteristics using linear regression models.ResultsKnowledge on possible routes of transmission of the novel coronavirus and the critical handwashing and mask-wearing etiquettes was poor. On a scale of 100, the mean composite knowledge scores of mothers and adult males were respectively 33.5 (SD=15; 95% CI 32.9 to 34.1) and 38.2 (SD=14.8; 95% CI 37.1 to 39.4). In contrast to knowledge, adult males obtained lower practice scores than mothers, primarily due to poor physical distancing practices. The mean practice scores of mothers and adult males were 63.0 (SD=18.1; 95% CI 62.3 to 63.8) and 53.4 (SD=17.5; 95% CI 52.0 to 54.7). Moreover, education, household income and access to television and the internet are significantly associated with knowledge. People residing proximal to a city revealed higher knowledge than the relatively distant ones. This was also the case for practice scores; however, the other factors associated with knowledge did not have a significant association with practices.ConclusionsIn general, both mothers and adult males presented with poor knowledge and practices related to COVID-19. While local, national and international institutions should design and implement educational interventions to help improve knowledge, our research shows that mere knowledge may not be enough to ensure practice. Hence, authorities could reinforce positive social norms by setting benchmarks and introducing rewards or sanctions to improve practices.
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